| 1. | Which is a sum of the rest energy and the kinetic energy.
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| 2. | The rest energy of the hot water is greater than the cold water.
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| 3. | We see that the rest energy is an independent invariant.
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| 4. | This is the sum of the rest energies of all the particles that compose earth.
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| 5. | In the rest frame of an object, it has a rest energy and zero momentum.
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| 6. | Invariant mass or rest energy is important to understand.
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| 7. | According to special relativity, the rest energy of an object is directly proportional to its mass.
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| 8. | :The second equations says that kinetic energy is total energy minus rest energy, which is quite intuitive.
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| 9. | For the same reason, it is possible to subtract the rest energy from the total energy in relativity.
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| 10. | When an electron moves it has more energy added to this rest energy which also means added mass.
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